Inherits: If T is a (possibly cv-qualified)
abstract type then inherits from true_type,
otherwise inherits from false_type.

C++ Standard Reference: 10.3.

Header:#include<boost/type_traits/is_abstract.hpp>
or #include<boost/type_traits.hpp>

Compiler Compatibility: The compiler must
support DR337 (as of April 2005: GCC 3.4, VC++ 7.1 (and later), Intel C++
7 (and later), and Comeau 4.3.2). Otherwise behaves the same as is_polymorphic;
this is the "safe fallback position" for which polymorphic types
are always regarded as potentially abstract. The macro BOOST_NO_IS_ABSTRACT
is used to signify that the implementation is buggy, users should check for
this in their own code if the "safe fallback" is not suitable for
their particular use-case.